This is true, I just tested google-chrome-unstable on CentOS 7 and yes it won’t install (google-chrome-stable and google-chrome-beta works normally). Hopefully this doesn’t mean that Google Chrome 61 and above (stable and beta releases), won’t work anymore on CentOS 7.

Solved the problem- it turns out that I had inadvertently disabled the main `fedora` repository a while back while troubleshooting a different package update problem. Re-enabling the `fedora` repo allowed me to install Google Chrome properly.

I’m not totally sure about your command, but have to say that sudo is not more secure than root user, of course you can limit sudo commands, but if you use ALL setting on sudoers file, then you can run any command using sudo. I can’t assume that this guide reader even have sudo installed or configured. I personally prefer changing root if I run multiple commands. Actually sudo is even more dangerous, because “hacker” can gain root access just hacking user account, if you don’t have sudo installed and use even different passwords for user and root account, then hacker have to hack two passwords. Unfortunately Ubuntu users have many times sudo obsession, before Ubuntu sudo was very rarely used.